NEW

ANALOGDESIGN GUIDE

1234567891011

Multiplexers, Switches

DC-DC Converters,Power Supplies

High-SpeedADCs & DACs

Signal Conditioners

Video/High-Speed Amps

Interface Products

Op Amps, Comparators

P SupervisoryAnalog Filters

A/D Converters

D/A Converters

Analog Functions

Voltage References

Temperature Sensors121314

is a registered trademark of Maxim Integrated Products, Inc. 2002 Maxim Integrated Products.

23rd EDITION444POWER SUPPLIES ANALOGDESIGN GUIDE

Data Sheets Applications Notes Free Samples

Smallest Complete Power-Management IC for Intel PXA210and PXA250 MicroprocessorsIntegrates 3 Supplies for CPUs Based on Intel XScaleMicroarchitecture

The MAX1702B is the smallest, most efficient power-management IC optimized for the IntelPXA210 and PXA250 microprocessors for PDAs, 3G smart phones, and hand-held products. TheMAX1702B features three high-efficiency (>90%) PWM, 1MHz step-down converters with synchronousrectification. The converters use small external components and eliminate the need for externaldiodes, saving cost and size. The MAX1702B fits in a 1mm high, 6mm x 6mm QFN package.Management functions include automatic power-up sequencing, power-on reset (POR), manual reset,output regulation monitor, and two levels of low-battery detection.

Three DC-DC Step-DownConverters: 3.3V at 900mA Peripherals

and I/O Supply 0.7V to 1.3VIN at 400mA

P Core Supply 1.8V/2.5V/3.3V at

800mA Memory Supply

1MHz PWM SwitchingAllows Small ExternalComponents

Low 5A ShutdownCurrent

Evaluation Kit SpeedsDesigns

Priced at $5.00

Intel is a registered trademark of Intel Corporation. XScale is a trademark of Intel Corporation.1000-up recommended resale, FOB USA. Prices provided are for design guidance and are for the lowest grade, commercial temperatureparts. International prices will differ due to local duties, taxes, and exchange rates. Prices are subject to change.

MAX1702B

INTELPXA210PXA250

Ps

OUTPUT13.3V

900mAINPUT2.6V TO 5.5V

DEAD BATT

RESETSWITCH

GND

IN LX1

OUT1

LX2

FB2

LX3

I/O POWER

COREPOWER

MEMORYPOWER

OUT3

MR

LOW BATTOUTOKRESET

OUTPUT20.7V TO VIN

400mA

OUTPUT31.8V/2.5V/3.3V

800mA

6m

m

x 6m m x

1mm

36-PIN QFN

THREE OUTPUTS, ALL SWITCHES INTERNAL, 1MHz PWM

MANAGEMENT FUNCTIONS: OUTPUT POWER-UP SEQUENCING LOW AND DEAD BATTERY DETECTION POWER-ON RESET OUTPUT-IN-REGULATION

PVIN

VIN

N

N

VIN

N

MAX1801

VIN

NON

OFF

OUT1

LDO

OUT2

STEP-UPMASTER

OUT3

OUT4

OSC

REF

GND

OUT1 ON

OUT2 ONOUT3 ON

OUT4 ONLDO ON

MAX1800

INPUT0.7V TO 5.5V

3.3V

EIGHT OUTPUTS

1.8V

7V

15V

-7.5V

18V 12V

5V

LOGIC

CORE

CCFL MODULE

CCD BIAS

LCD BIAS

ZOOMMOTOR DRIVE(OPTIONAL)

N

P

DLOSC SLAVE

CONTROLLERREF

MAX1801

VIN

N

5V LENS COVERDRIVE(OPTIONAL)

DLOSC

REF

ADD UPTO FIVE SLAVECONTROLLERS

SLAVECONTROLLER

32-PIN TQFP5mm x 5mm*7mm x 7mm x 1mm

(DIMENSION INCLUDES LEADS)

MAX1800 STEP-UP MASTERMAX1802 STEP-DOWN MASTER

MAX1801 SLAVE CONTROLLER8-PIN SOT23

2.8mm x 2.9mm

Smallest, Highest Efficiency, Multioutput DC-DC ConverterCompact, Cost-Effective, Integrated Power-Supply Solutions forDigital Cameras and PDAs

Use the MAX1800 step-up master or the MAX1802 step-down master to provide all the voltageoutputs required in your digital camera and PDA designs from a single IC. These outputs includehigh-efficiency DC-DC converters with synchronous rectifiers to give over 90% efficient power conver-sion for the logic supply, which uses >50% of the power in a camera system. These devices come in asmall 32-pin 5mm x 5mm TQFP, which is 40% smaller than existing TQFP solutions. TheMAX1800/MAX1802 also eliminate external components such as power diodes, power switches, andat least one transformer to save cost and size. For flexibility, add the low-cost, 8-pin SOT23 MAX1801slave controller to create optional features like a motor control supply for zooming and focusing. TheMAX1800/MAX1802 can provide all the voltages for logic, core, backlighting, LCD, and expansionport of PDAs.

EXAMPLE OF A COMPLETE DIGITAL CAMERA POWER SUPPLY(CAN ALSO BE USED IN PDAs)

1-, 2-, 3-, or 4-Cell Designs

*Dimensions include 5mm body plus 1mm for the length of each lead for a total of 7mm.

Step-down controller,three step-up controllers,

internal step-down

Internal step-up,three step-up controllers,

LDO controller

Two Li+, four alkalineOne Li+, two or three alkaline

2.5V to 11V input0.7V to 5.5V input

Step-downStep-up, step-up/down

MAX1802MAX1800

INPUT1.5V TO 14V

VBIAS4.5V TO 14V

POWER-OK

DDRREF

INPUT

VTT OR VDDQOUTPUT

0.75V TO 5VUP TO 25A

VTTROUTPUT

UP TO 25mA

MAX1917

DH

LX

DL N

N

GND

VTT

VTTR

POK

V+

DDR

ILIM

Fastest Transient Response DC-DCReduces Capacitor Cost of DDRMemory Supplies25A VTT/VTTR or VDDQ Step-Down DC-DC Is Smallest and Most Efficient

Internal Soft-Start 5A Shutdown Supply Current Integrated VTTR Reference Smallest Output Capacitance

Up to 96% Efficiency Current-Limit and Short-Circuit

Protection Without Current-SenseResistors

PARAMETER MAX1917 COMPETITION

Performance with+7A to -7A transient Output Within 35mV Output Within 80mV

Capacitors4 x 270F + 2 ceramics

3 x 580F + 10 ceramics

Lowest Cost Track, Source, and SinkControllers for DDR and PowerPCTM

PowerPC is a trademark of Motorola, Inc.1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packagesare offered in 1k increments, and some may require minimum order quantities.

Low Input Voltage (Down to 3V) Low Cost: $0.95

Current-Limit and Short-CircuitProtection Without Current-SenseResistors

Internal Digital Soft-Start Thermal Shutdown

COMP/SHDN

ONOFF

INPUT3V TO 5.5V

REFINCOMP/SHDN

MAX1957VTT SUPPLY

ONOFF

INPUT3V TO 12V

MAX1954

R

R

VDDQ SUPPLY

DDRMEMORY

(OR PowerPC)

VTT(VCORE)

VDDQ(VI/O)

OUTPUTVTT FOR DDR

(OR VCORE FOR PowerPC)

OUTPUTVDD FOR DDR

(OR VI/O FOR PowerPC)

VTT TRACKS VDDQWITHIN 1%

VTT

35mV

ILOAD

400s/div

50mV/div

3A

0A

-3A

VTT TRANSIENT RESPONSE MEETS40mV JEDEC SPEC

Lowest Cost Three- and Five-Output xDSL and Cable Modem Supplies

LDO4

POK

LDO2

LDO3

LDO1

DL

DH N

N

GNDPOWER-OKSIGNAL

V+

INPUTLOW-COSTADAPTER

4.5V TO 28V 3.3V1A

FIVE OUTPUTS

2.5V500mA

5V100mA

12V100mA

POSITIVELINE DRIVER

-12V100mA

NEGATIVELINE DRIVER

I/O

CORE

ANALOG FRONTEND (AFE)MAX1865T

COMPLETE, LOW-COST, FIVE-OUTPUT xDSL MODEM SUPPLYSTEP-DOWN CONTROLLER + MULTIPLE LDOs

6m

m x 8.65mm

20

-PIN QSOP

6m

m x 4.9m

m

16

-PIN QSOP

1864

1865

No Current-SenseResistors Mean Lower Cost

1.25V to 5.5V Step-Down Output

1.25V to 15V LDO Outputs

Power-OK Checks All Outputs

EV Kit Speeds Designs

Low Cost: $1.75 (MAX1864T)

ON/OFF

ANY I/OPOWER SUPPLY

VOUTVINVIN(VCORE + 2.5V

TO 5.5V)

VI/O (1.5V TO 4V)

TO PowerPCOR DSP ARRAYVCORE

(0.8V TO 4V)

ANY COREPOWER SUPPLY

VOUTVIN

I/O

EN_OUTVIN

UVLO

GND

CORE

CORE_FB

NDRV

MAX5039

ON/OFF

Worlds First Voltage-TrackingController IC for PowerPC and DSPs

1000-up recommended resale, FOB USA. Prices provided are for design guidance and are for the lowest grade, commercial temperature parts. International prices will differ due to localduties, taxes, and exchange rates. Prices are subject to change.

High System Reliability

Lowest Cost 1A to 15A Step-DownDC-DC Solution100kHz Switching Permits Low-Cost Components for Set-Top,Consumer, and Telecom Equipment

INPUTOUTPUT

0.8V TO 0.88 x VIN1A TO 15A

MAX1966MAX1967

DH

LX

DL N

N

GND

VIN

FBSHDN/COMP

MAX1967

MAX1966

$0.88

$0.80

ON

OFF

5m m x 3m

m

10

-PIN MAX

5m

m x 6.2m

m

8-PIN SO

MAX19672.7V TO 28V INPUT FOR WALL

CUBE OR 3.3V/5V/12V/24V BUS OPERATION

MAX19662.7V TO 5.5V INPUT FOR 3.3V/5V BUS OPERATION

Lowest Cost N-Channel FETs Low-Cost Electrolytic

Capacitors Low-Cost Inductors Lowest Cost Current-Limit

and Short-CircuitProtectionNo SenseResistor Needed

Digital Soft-Start 96% Efficiency Cost-Effective High-Current

LDO Replacement Fixed-Frequency 100kHz

Voltage-Mode PWM 2.5 (5 max) Gate Drivers

ONOFF

INPUT3V TO 5.5V

OUTPUTDOWN TO 0.8V

UP TO 10A

10AAPPLICATIONCOMPONENTS

MAX1953DH

IN

LX

DL N

N

GND

COMP/EN

ILIMADJILIM

10mm

34mm

HIGHEST EFFICIENCYVIN = 5V, VOUT = 2.5V100

95

90

EFFI

CIEN

CY (%

)

85

801 2 3 4 5

OUTPUT CURRENT (A)6 7 8 9 10

Smallest 1MHz, 92%-Efficient DC-DC Step-Down Delivers Up to 10AFastest Transient Response Reduces Capacitance, Cost, and Space

Thermal-Overload Protection Lowest Cost N-FET Design Current-Limit and Short-Circuit

Protection Without Current-SenseResistor

Smallest, All-Ceramic Design Internal Digital Soft-Start Low Cost: $0.99

Evaluation Kit Available1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packagesare offered in 1k increments, and some may require minimum order quantities.

NEW

43% Smaller, Dual, Step-Down DC-DC for GBIC/USB xDSL ModemsUltra-Compact Internal Switch Design with 1.4MHz, 180 Out-of-Phase Operation, Integrated POR

MAX1970/MAX1972

Competitors 1.4MHz Parts

Smallest footprint (68mm2)

Lowest profile (1.8mm)

76% larger footprint (120mm2)

39% higher profile (2.5mm)

MAX1970MAX1971MAX1972

EN

IN

RSI

LX1

CIN

GND

POR

PFO

LX2

ON

INPUT2.6V TO 5.5V

1.4MHz SWITCHINGFREQUENCY OUTSIDEDSL BAND IMPROVES

BAUD RATE

POWER-ONRESET

DYING-GASPDETECTION

(MAX1970/MAX1972)

OUTPUT21.2V TO 5V

750mA

RESETINPUT

(MAX1971)

OUTPUT11.2V TO 5V

750mA

OFF

SMALL 10F CIN REDUCES INRUSH

CURRENT, COMPLIES WITH USB SPECS

NEW

NEW Lowest Cost, Out-of-Phase DualStep-Down Reduces CapacitorSize and Cost

180 OUT-OF-PHASEOPERATION REDUCES

CIN SIZE AND COST

LOW-COST EXTERNALCOMPONENTS;

N-CHANNEL FETs; NO CURRENT-SENSE

RESISTORS

100kHz TO 600kHzOPERATION;

OPTIONAL SYNC

INPUT4.5V TO 28V

OUTPUT 10.75V TO 15V

UP TO 10A

OUTPUT 20.75V TO 15V

UP TO 10A

MAX1875MAX1876

DH1

LX1

DL1

DH2

LX2

DL2 N

N

140msENOFF

ON

SYNCGND

V+

RESET

CKO

HIGHEST EFFICIENCY POWER SUPPLY FOR BROADBANDCPEs, SET-TOP BOXES, AND DIGITAL TV

N

N

LOW-COST AC ELECTROLYTICCAPACITORS OR SMALLCERAMIC CAPACITORS

INTEGRATED POWER-ONRESET REDUCES SYSTEM

COST AND SIZE (MAX1876)

CLOCK OUPUT: 2 x MAX1875/MAX1876OPERATE 4 CONVERTERS 90

OUT-OF-PHASE TO REDUCE CIN

96% EFFICIENT

1000-up recommended resale, FOB USA. Prices provided are for design guidance and are for the lowest grade, commercial temperature parts. International prices will differ due to localduties, taxes, and exchange rates. Prices are subject to change.

1A-to-60A Step-Down Controllersfor Nonportable ApplicationsNetwork/Telecom Equipment, Base Stations, xDSL/Wireless andCable Modem/Routers, Set-Top Boxes, Desktops, and Servers

1A to 5A

MAX1970/MAX1972Internal switch, smallest dual 0.75A,1.4MHz, POR, all ceramic

2.7 to 5.5

MAX1971Internal switch, smallest dual 0.75A withPOR for SFP GBIC modules

2.7 to 5.5

MAX1973Internal switch, smallest 1A, 1.4MHz, allceramic, voltage margin

2.7 to 5.5

MAX1974Internal switch, smallest 1A, 0.75VOUT,1.4MHz, all ceramic, POK

2.7 to 5.5

MAX1966Lowest cost, 100kHz2.7 to 5.5

MAX1957Lowest cost, DDR termination source/sink, tracking

3 to 5.5

VINPUT(V) Products

1A to 10A

MAX1953Smallest, all ceramic, 1MHz2.7 to 5.5

MAX1954Lowest cost, 300kHz3 to 13.2

MAX1864Switcher + 2 LDO4.5 to 28

MAX1964Switcher + 2 sequenced LDOs4.5 to 28

MAX1865Switcher + 3 positive and 1 negative LDOs

4.5 to 28

MAX1965Switcher + 3 positive and 1 negativetracking LDOs

4.75 to 23

MAX1875Dual out-of-phase4.75 to 23

VINPUT(V) Products

1A to 25A

MAX19171.5V to 22V input, DDR termination source/sink,tracking, smallest output capacitors

Dual Version Contact factory

Products

20A to 60A

6V to 24V input, VID and non-VIDoutputs. 6V gate drives smallest outputcapacitors, Intel VRM9.09/9.1 and AMDAthlon (MAX1938), AMD Hammer(MAX1937), Athlon Mobile (MAX1939)

Dual Phase

TEC Controllers and APD Bias for Optical Modules/Networks

Smallest, safest, and most accurate TECcontroller; Internal power MOSFETs,0.5MHz/1MHz frequency reduces size ofexternal components; Independent andaccurate heating/cooling control eliminates current surges.

MAX1968

Smallest, safest, most accurate single-chip TEC controller; Fits 0.93in2,

MAX5021MAX5022

85VAC TO 265VAC

OPTOCOUPLERFEEDBACK

750k1/4W

CERAMIC CAP0.22F

VINNDRV

CS

VOUT5V

SOT23RSENSEOPTO

Industrys First SOT23 UniversalOff-Line PWM Controllers

*10,000-up recommended resale, FOB USA. Volume price discounts available.

FULLY TEST

ED

5V/1A UNIV

ERSAL

OFFLINE EV

ALUATION

KIT AVAILAB

LE

MOSFET Driver Combines Highest Performance and Most Design FlexibilityHigh Output Current, High Speed, Robust FET Driver in a Tiny SOT23

Smallest 56% Smaller than

Competitors TSSOP Package

*Future productcontact factory for availability.1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packagesare offered in 1k increments, and some may require minimum order quantities.

MAX5048*

BREAK-BEFORE-

MAKECONTROL

V+

IN-

IN+

GND

P_OUT

N_OUT

P

N

3m m x 3 m

m

6-

PINSOT23

Highest Performance 7.6A Sink/1.3A

Source Current Matching 12ns

Propagation Delay from IN+ or IN-

V+ = 4V to 12.6V, 13V Transients

Up to 14V Logic Input Regardless of V+ Voltage

Flexibility of Design Independent Rise/Fall

Time with Separate Source/Sink Outputs

Invert/Noninvert Inputs Control MOSFET and Shutdown

FUTURE

PRODUCTS

Increase Efficiency 50A Startup Current, Startup

Resistor Dissipates Only 40mW Up to 80% Efficiency at 120VAC

Line Input Operates from Low-Voltage

Auxiliary Winding after Startup Only 1.2mA Operating CurrentSave Space SOT23 Package Uses Surface-Mount Transformer 250kHz Switching FrequencyLower Power-Supply Cost Minimum Component Count Standard Low-Cost Components Low Cost: $0.66* (MAX5021/

MAX5022)

0.87

Logic Input

VCC CMOS2MAX5048A*

Part

Flyback isolated power supplyup to 10W output powerMAX5022

Forward converter isolated power supplyup to 15W output powerMAX5021

ApplicationPart

75

50

Max Duty Cycle(%)

0.87TTLMAX5048B*

Price ($)

First 48V Quad Hot-Swap Controllers for IEEE802.3af-Compliant Power-Over-LAN SystemsEliminates 16 External Components and Fits in 13mm x 13mm Area

High Reliability Foldback Current Limit

Reduces External MOSFETPower Dissipation

Dual-Level Current Response Prevents False Trip

Highest Integration Zero-Current Load Disconnect Latched or Autoretry Fault

Management Programmable Autoretry Duty

Cycle and OvercurrentTimeout

ON/OFFON/OFF CONTROL

VCC = 35V TO 72V

CONTROL FOR CHANNEL RELAY

POWER-OK OR OPEN-CIRCUIT

STATUS OUTPUT

OPEN CIRCUIT OR OVERCURRENT FLAG

RELAYON/OFF

STATUSOUT

FAULT

PORT 1-4

SENSE

DRAIN

GATE

OUT

RELAYDRIVER

VCC

DGND AGND

MAX5913 (LOW)MAX5914 (HIGH)

4CHANNELS

4 4

4

4

4

4

4

INDEPENDENT CONTROL AND STATUS FOR EACH CHANNEL

2

2

3.3VOA3.3VSENSE_A3.3VGATE_A

AUXONPGOOD_AON/OFF

5VO5VSENSE_A5VGATE_A

PCI SLOT A

3.3VAUXOA5V

-12VOA+12VOA

3.3VAUX

+5V

+3.3V

GND

-12V+12V

+12VIN -12VIN3.3VAUXIN

+12V -12V3.3VAUX

GND

MAX5915MAX5916

CHANNEL1 OF 2

3.3V

PCI CARD A

1. HIGHEST INTEGRATIONINTEGRATED MOSFET SWITCHES FOR +12V,-12V, AND +3.3V AUXILIARY OUTPUTS FOR

BOTH PCI SLOTS

2. PCI2.2 COMPLIANTHOT SWAP +3.3V, +5V, +12V,

-12V, AND +3.3V AUXILIARY VOLTAGERAILS FOR 2 PCI CARDS

3. FLEXIBILITY OF DESIGNINDEPENDENT ON/OFF CONTROL FOR MAIN AND

AUXILIARY OUTPUTS FOR BOTH PCI SLOTS

Industrys First Dual PCI2.2 Hot-Swap Controllers

1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packagesare offered in 1k increments, and some may require minimum order quantities.

Independent 3.3VAuxiliary Output withSeparate ON/OFF Control

Foldback and BrickCurrent-Limit SchemesPrevent Fault Trips andMOSFET Overheating

Intelligent ThermalShutdown DisablesChannel with FaultCondition

Fault Management:Latched (MAX5915)Autoretry (MAX5916)

Priced at $4.67

NEW

NEW

6.50mm x 9.8mm

28-PIN TSSOP

Small, Triple USB Switch withAutoreset and Fault BlankingAutoreset Saves System Power; 20ms Fault Blanking Prevents False Alarms

The MAX1940 is a triple current-limited switch with autoreset and fault blanking for USB applica-tions in notebook computers, desktop computers, and PDAs. Each channel is guaranteed to supply500mA and meets all USB specifications. The MAX1940 features built-in thermal-overload protectionand internal current-limiting circuitry that protect the input supply against both overload and short-circuit conditions.

t = 10ms/div

SHORT-CIRCUITFAULT RESPONSE

5V, VIN

5V

0

5V

0

1A

0

VOUT

FAULTINDICATOR

IOUT

MAX1823FAULT INDICATOR TRIPS AFTER 20ms BLANKING

TO PREVENT HOT-SWAP GLITCHES

FAULT-CONDITION CURRENT LIMITED TO 350mARMS

BY PULSING (COMPETITOR'S CURRENT SHOOTS TO ISHORT)

SWITCH TURNS ITSELF OFFAFTER 20ms (COMPETITION WAITSFOR MICROPROCESSOR SIGNAL,

WASTING POWER AND RISKING DAMAGE)

SHORT CIRCUIT REMOVED ANDAUTOMATICALLY DETECTED BY MAX1823

(COMPETITION REQUIRES DETECTION CIRCUIT AND MANUAL POWER RECYCLING)

20ms RESET SIGNAL ALLOWSPROPER SYSTEM STARTUP

SWITCH TURNS ITSELF ON 20msAFTER DETECTING FAULT REMOVAL(COMPETITION REQUIRES MICRO-

PROCESSOR SIGNAL)

SHORT APPLIED

Smart, Dual USB Switch ReducesSoftware Overhead with AutomaticTurn-Off/-On

Triple USB Switch in Tiny 16-Pin QSOP Package

Active-High/Active-Low Control Logic

Independent Shutdown Control Independent Fault-Indicator

Outputs Thermal-Overload Protection 3A Shutdown CurrentOUTA

OUTB

OUTC

ONA

ONB

ONC

SEL

FAULTA

FAULTB

FAULTC

INPUT 4V TO 5.5V

IN 3

GND

MAX1940

ACTIVE-HIGH/ACTIVE-LOW SELECTABLE

TO USBPORT A

TO USBPORT B

TO USBPORT C

OK

CLR

12:06p

BrowserPhone

No New

Messages

NEW

4.8m m x 6m

m

16-QSOP

Small, 1A Current-Limited SwitchOffers Low Cost and Tight Accuracyfor Two USB Ports

The MAX1922 high-side MOSFET current-limited, 70m power switch has built-in fault blanking.An accurate preset 1.4A to 2.1A current limit better protects power distribution systems in USB,PCMCIA cards, and other hot-swap plug-in applications. The MAX1922 prevents a systems powersupply from crashing due to an overcurrent (OC) or short-circuit condition at the switchs output. TheMAX1922 input voltage ranges from 2.7V to 5.5V, making it ideal for both 3V and 5V systems.

Smallest, Low-Cost, USB SwitchHas Autoreset and Fault Blanking

The MAX1946 single current-limited switch comes in a tiny 3mm x 3mm QFN package withautoreset and fault blanking for USB applications. Input voltage ranges from 2.7V to 5.5V, making itideal for both 3V and 5V systems. Built-in thermal-overload protection and internal current-limitingcircuitry protect the input supply against both overload and short-circuit conditions.

Accurate Current Limit: 1.4A (min), 2.1A (max)

10ms Internal OC-Blanking Timeout OC Blanking During Power-Up Short-Circuit and Thermal Protection

with OC Logic Output Undervoltage Lockout (UVLO) 16A Quiescent Supply Current 1A (max) Standby Supply Current

Guaranteed 500mA Load Current Autoreset Saves System Power Built-In 20ms Fault-Blanking Circuitry Active-High/Active-Low Control Logic Fault Indicator Outputs Thermal-Overload Protection 3A Shutdown Current Priced at $0.58

MAX1922

IN OUT

INPUT2.7V TO 5.5V

ON

OFF

GNDEN OC

TO USBPORT A

OVERCURRENTSIGNAL

TO USBPORT B

IN

FAULT

OUT

TO P

OUTPUT 500mAENABLE

SEL

INPUT2.7V TO 5.5V

ACTIVE-HIGHACTIVE-LOW

ENABLESELECTION

GND

MAX1946

3m

m

x 3m m x0.

6mm

8-PIN QFN

3m m x 5m

m

8-PIN MSOP

COMPETITIONMAX1946

40% SMALLER

NEW

NEW

1000-up recommended resale, FOB USA. Prices provided are for design guidance and are for the lowest grade, commercial temperature parts. International prices will differ due to localduties, taxes, and exchange rates. Prices are subject to change.

USB Power-Management ICs OfferHighest Integration

MAX5008 ($1.08)

Output Short-Circuit Protection with Programmable Current Limit

Tiny Surface-Mount Ceramic Capacitors

Eliminates an External Current-Limited High-Side Switch or LDO Regulator

1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packages are offered in 1k increments, and some may require minimum order quantities.

ENABLE

1MHzCHARGE PUMP

FAULT

ON/OFF

MAX5008

MAX5005MAX5006MAX5007

OUTPUT5V

125mA

OPTIMIZED FOR USB HOSTS OPTIMIZED FOR USB PERIPHERALS

INPUT2.9V TO 5.5V

RESET

P

VBUS

D+

5V

D-

GND

USB PORT3.3V USB

CONTROLLER

SUPERVISORY

OPEN

1.5k 1FCERAMIC

3.3V

RESET

SELR

LDO REGULATOR VCC

RST

D+

D-

MAX5005/MAX5006/MAX5007 ($0.87)

15kV Transient Voltage Suppressors for Data Lines

3.3V/150mA LDO Regulator with 30A Quiescent Current

P Reset Circuit

Internal D+ and D- Termination Resistor and Control

NEW

3m m x 5m

m

10

-PIN MAX

NEW

NEW

NEW

Maxim Offers a Wide Selection ofUSB Current-Limited Switches withTight Current Limits and Small Size

PartNo.

of USBPorts

InputVoltage

(V)

GuaranteedOutput Current

(mA)

TightCurrent-Limit

Accuracy

On- Resistance

(m)

MAX1693/1694 1 2.7 to 5.5 500 60

FaultBlanking

Autoreset

ThermalShutdownProtection

Pin-Package

10-MAX

8-SOMAX1607 1 2.7 to 5.5 500 60

10-MAXMAX1812 2 4 to 5.5 500/channel 75

10-MAXMAX1823 2 4 to 5.5 500/channel 75

8-SOMAX1922 2 2.7 to 5.5 1.4A 70

16-QSOPMAX1940 3 4 to 5.5 500/channel 75

8-QFN(3mm x 3mm)MAX1946 1 2.7 to 5.5 500 80

NEW Smallest 500mA, Low-DropoutLinear Regulator in 2.3mm2 UCSP

Low 133mV Dropout at 500mA

1% Output Voltage Accuracy

Preset Output Voltage at 1.5V, 1.8V, 2V, 2.5V,3.3V, 5V, or Adjustable from 1.25V to 5.5V

500mA Guaranteed Output Current

Low 125A Ground Current

0.1A Shutdown Current

Thermal-Overload and Short-Circuit Protection

Tiny UCSP (Chip-Scale) Package

Priced at $1.20

UCSP is a trademark of Maxim Integrated Products, Inc.1000-up recommended resale. Price provided is for design guidance and is FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packages areoffered in 1k increments, and some may require minimum order quantities.

MAX1819 MAX1819

SET GND

SHDN POK

IN OUT

100kPOWER-OK

TOC

OUTPUT500mA

1.25V TO 5.5V

500mA LDO

72% SMALLER

SMALLESTCOMPETITOR

INPUT2.5V TO 5.5V

3.3F1F

ON

OFF

12:06p

1.52mm

AREA = 2.3mm2AREA = 8.1mm2

UCSP

1.52mm

PDISS = 840mW PDISS = 800mW

SOT23-6

2.9mm

2.8mm

1.45mm, max

0.65mm,max

Lowest Dropout and Lowest CostSOT23 and QFN LDOs for Basebandand RF Chipsets

2.2 Fixed 1.8 to 3.3 in 50mV increments

2.2

1

2.2

1.8, 2.5, 3.3, 5, or adj 1.25 to 5

Fixed 1.8 to 3.3 in 100mV increments

Fixed 1.5 to 3.3 in 100mV increments

1

1

1

Fixed 2.5 to 5 in 100mV increments

Fixed 2.5 to 5 in 100mV increments

Fixed 2.5 to 5 in 100mV increments

3.3

COUT (F)

1

1

Output Voltage (V)

1.8, 2.5, 3.3, 5, or adj 1.5 to 5

1.5, 1.8, 2, 2.5, 3.3, 5, or adj 1.25 to 5

2.8, 2.84, 3.15, or adj 1.25 to 6.5

MAX8890 Triple 100mA output LDOs in 4mm x 4mm QFN

MAX8882/3

MAX8880/1

MAX8887/8

200mA output, reverse-battery protection

Dual 160mA output LDOs in SOT23

150mV dropout at 300mA, thin 1.1mm (max) height

MAX8875

MAX8867/8

MAX8877/8

150mA output, reverse-battery protection

150mA output with POK, reverse-battery protection

150mA output, 1.1mm high, reverse-battery protection

MAX1818

Part

MAX1725/6

MAX8863/4

Features

20mA output, IQ = 2A quiescent current,reverse-battery protection

120mV dropout at 500mA

3.3 1.5, 1.8, 2, 2.5, 3.3, 5, or adj 1.25 to 5MAX1819 120mV dropout at 500mA, UCSP package

120mA output, reverse-battery protection

OFF

ONSHDNB

UP TO 160mA1.8V TO 3.3V

UP TO 160mA1.8V TO 3.3V

DUALOUTPUTS

IN

GND

OUTA

OUTB

MAX8883

INPUT2.5V TO 5.5V

OFF

ONSHDNA

80

00.01 0.1 1 10 100 1000

PSRR vs. FREQUENCY

10

20

FREQUENCY (kHz)

PSRR

(dB)

40

30

60

70

50>75dB

AT UP TO 10kHz!

>65dBAT UP TO 100kHz!

100

0

CHANNEL-TO-CHANNEL ISOLATION vs. FREQUENCY

20

FREQUENCY (kHz)

CHAN

NEL-

TO-C

HANN

EL IS

OLAT

ION

(dB)

40

60

80

10

30

50

70

90

0.01 0.1 1 10 100 1000

>90dBAT UP TO 10kHz

>85dBAT UP TO 100kHz >65dB

AT UP TO 1MHz

50% SPACE SAVINGS AND EXCELLENT AC PERFORMANCE

6-

PINSOT23

2.8m m x 2.9

mm

0.7W

DISSIPATION

GREAT ISOLATION

GREAT PSRR

DUAL LDOs IN TINY SOT23 PACKAGE

1.0 MOSFET PASS SWITCHES

First Dual 160mA LDOs in SOT23 The MAX8882/MAX8883 are

dual, low-noise, low-dropoutlinear regulators that operatefrom a 2.5V to 6.5V input anddeliver up to 160mA of continu-ous output current from eachoutput. These devices are lessthan half the size of their closestcompetition, yet their ultra-low 1.0 on-resistance is lowerthan most single-LDO competi-tion in the same package. EachLDO has only 72mV dropout at80mA for longest battery life.Both devices are available in fixedoutput voltages of 2.85V/2.85V,3.3V/2.5V, 3.3V/1.8V, 3V/3V, and2.5V/1.8V.

Smallest Low-Cost Step-Up DC-DCOperates on Only 1.5A!

ONOFF

MAX172410F

10F

OUTPUT2V TO 5.5VUP TO 150mASHDN

IN

GND

OUT

LX

INPUT0.8V TO 5.5V

LOWESTQUIESCENT SUPPLY

CURRENT

10H

NO DIODE N

EEDED!

INTERNAL

SYNCHRONO

US

RECTIFIER

3m

mx 3mm x

1mm

5-PIN SOT23

NEW

Ultra-Low 1.5A Quiescent Supply Current

Only Three Small ExternalComponents Required

Guaranteed 0.91V Startup Internal EMI-Suppression Circuitry

0.1A Shutdown Supply Current Thin 5-Pin SOT23 Package

(1mm Height) Evaluation Kit Speeds Designs Priced at $1.45

2500-up recommended resale, FOB USA. Prices provided are for design guidance and are for the lowest grade, commercial temperature parts. International prices will differ due to localduties, taxes, and exchange rates. Not all packages are offered in 1k increments and some may require minimum order quantities..

*Contact factory for other fixed output voltages.

Output*(V)

Adjustable

Adjustable

Part SHDN

MAX1722EZK No

MAX1723EZK Yes

Low-EMICircuitry

Yes

Yes

Fixed 2.7

Fixed 3.0

MAX1724EZK27 No

MAX1724EZK30 Yes

Yes

Yes

Fixed 3.3

Fixed 5.0

MAX1724EZK33 No

MAX1724EZK50 Yes

Yes

Yes

Smallest 800mA, 0.75VOUTStep-Down DC-DC for Sub-1V PsHigh-Efficiency, Built-In Power-OK and Synchronous Rectifier

The MAX1927/MAX1928 are the first and only step-down DC-DC converters to deliver 800mA atoutputs down to 0.75V for low-voltage microprocessors. Both devices switch at 1MHz to reduceexternal component size and provide low-noise output for portable equipment such as 3G phones andPDAs. The MAX1927/MAX1928 allow 62% longer talk time than traditional LDO linear regulators.Additionally, smaller batteries can be used to reduce weight and cost.

INPUT2.6V TO 5.5V 4.7H

28

10 100 1000

RST

VCC

POK

FB

GND

N

P

1MHz PWM LOW-NOISE OPERATION AND

SMALL COMPONENTS

LDO LINEAR

REGULATORS

HIGH-EFFICIENCY LOW-VOLTAGE DC-DC

EFFI

CIEN

CY (%

)LOAD CURRENT (mA)

OUTPUTDOWN TO 0.75V

UP TO 800mA

MAX1927

INTEGRATED POK TO ELIMINATE EXTERNAL RESET

BUILT-IN SYNCHRONOUS RECTIFIER,

NO SCHOTTKY DIODE NEEDED

LATEST GENERATION

SUB-1VMICROPROCESSORS

MAX1927/MAX1928

100

OK

CLR

12:06p

BrowserPhone

No New

Messages

0

LESS HEAT AND LONGER BATTERY LIFE

3mm

x 5m m x1m

m

10-PIN MAX

NEW

Highest Power, SOT23 Step-DownConverters Deliver 400mA 1.2MHz Switching Permits Ceramic Capacitors and Small Inductor

OUTPUT1.25V TO 5V

1.5% ACCURACYUP TO 400mA

INPUT2V TO 5.5V

MAX1921

4.7HLX

OUT

SHDN

IN

OFF

ON

HIGHESTPOWER FROM

SOT23

LOW COST$1.35

100 100080

95

90

85

100

1 10

LOAD CURRENT (mA)

EFFI

CIEN

CY (%

)

VIN = 3.6VVOUT = 3.3V

87% AT 1mA 97%

INTERNAL SYNCHRONOUS RECTIFIER; 100% DUTY CYCLE FOR LOW DROPOUT

HIGH EFFICIENCY

NOTE: MAX1920 has external feedback resistors for adjustable output. MAX1921 has a fixed output (3.3V, 3V, 2.5V, 1.8V, 1.5V).

3mm

x 3mm x 1.4

5mm

6-PIN SOT23

2500-up recommended resale Price provided is for design guidance and is FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packages areoffered in 1k increments, and some may require minimum order quantities.

NEW

First High-Efficiency 1x/1.5xRegulating Charge Pump ProvidesCurrent Matching for White LEDsPower Up to Five White LEDs with 0.3% LED-to-LED CurrentMatching and 200mV Dropout

EN1

EN2

PGND

IN

SET

GND

LED1LED2LED3LED4

OUT

C1P C1N C2P C2N

1F

1F 1F

4.7F

RSET

ON/OFFAND

DIMMING

LED5

1x/1.5x REGULATING CHARGE PUMP

OUTPUT30mA / LED

INPUT2.7V TO 5.5V

LOW-DROPOUTCURRENT

REGULATORS

REFERENCEAND

CONTROL

EFFI

CIEN

CY (%

)

Li+ CELL VOLTAGE (V)

80

100

60

40

4.24.03.53.02.5

PDC/ CDMA = 93%

GSM = 87%

50% IMPROVEMENT

CONVENTIONAL 1.5xCHARGE PUMP

BATTERY CAPACITY

MAX1570

MAX1570

The MAX1570 current-matching feature eliminates costly factory calibration and special batch ordering

The MAX1570 1x charge-pump mode improves white LED efficiencyby 50% over 87% to 93% of the batterys useful charge cycle

Complete Solution with Four Ceramic Capacitors

Digital or PWM Brightness Control

Complete Input-to-Output Disconnect in Shutdown

Low 200mV Dropout Voltage

4mm x 4mm 16-Pin QFN

Low Cost: $1.90

Regulated Charge Pumps Give 33% Better Efficiency for PoweringWhite LEDs

The MAX1910/MAX1912 regulated 1.5x/2x charge pumps improve efficiency by 33% compared to2x charge-pump boosters. Any LED matching schemes can be accommodatedvoltage mode forconventional designs with ballast resistors, as well as current mode for direct LED current control.

SET

MAX1912

GND

IN

SHDN

OUT

CM1CP2

CM2

CP1

INPUT2.7V TO 5.3V

2.2F

ON

OFF

0.47F

0.47F 13 13 13 13

OUTPUTUP TO 120mA

2.2F

LOW INPUT CURRENT RIPPLE =SMALL CERAMIC CAPACITOR

REGULATES OUTPUTCURRENT FOR BRIGHTNESS MATCHING

750kHz POWER OPERATION

3.0 3.2 3.4 3.6 3.8 4.0 4.240

50

60

70

80

MAX19121.5x CHARGE PUMP

33% IMPROVEMENT!

TRADITIONAL2x CHARGE PUMP

33% IMPROVEMENT

BATTERY VOLTAGE (V)

EFFI

CIEN

CY (%

)

COMPLETE INPUT-TO-LOADDISCONNECT DURING SHUTDOWN

NEW

NEW

1000-up recommended resale, FOB USA. Prices provided are for design guidance and are for the lowest grade, commercial temperature parts. International prices willdiffer due to local duties, taxes, and exchange rates. Prices are subject to change.

World-Class Security in a 1kbEEPROM Protects Your Battery Packfrom Unauthorized Cloning

Battery Pack ID Solutions

World-Class Security with the SHA-1Algorithm (U.S. Government FIPS 180-1)

Unique, Factory-Lasered 64-Bit ID

1-Wire, Multinode DigitalCommunication Interface

Operating Power Derived Entirelyfrom the 1-Wire Bus

Available in Flip-Chip and 6-PinTSOC Packages

The DS2432 1-Wire 1kb EEPROM provides world-class security with the U.S. Government-developed Secure Hash Algorithm (SHA-1) for challenge/response protection of stored data. Thefeatures of the DS2432 and the security of SHA-1 effectively control unauthorized cloning of batterypacks by third parties. For example, a host system can be configured to accept power only from abattery pack containing the SHA-1 capability and specific data known only to the manufacturer.

HOST PROCESSOR

PACK +

DATA

PACK -

PACKHOST

+-

1-WIRE INTERFACE

UNIQUE 64-BITROM

64-BITSECRET

1kb EEPROM ARRAY

512-BIT SHA-1 ENGINE

DS2432

TO-92, 8-SO, Flip Chip (2.0 x 1.4)

6-TSOC, Flip Chip (1.4 x 1.1)

Pin-Package(mm2)

TO-92, 6-TSOC,CSP (1.4 x 0.7)

6-TSOC, Flip Chip (2.5 x 1.8)

DS1822

Part 64-Bit ROMReal-Time

Clock1-Wire

Interface

DS2401

DS2415

DS2432

TO-92, 8-SODS2436

8-SODS2438

8-SOPDS2720*

16-TSSOP, Flip Chip (3.2 x 2.7)DS2761*

2

EEPROM(Bytes)

1024 bits

32

40

8

32

12

Local TempSensor (Bits)

13

13

11

VoltageADC (Bits)

10

10

11

FuelGauge

Li+Protector

Single Cell

Single Cell

DS1701K

EV Kit

DS2436K

DS2438K

DS2720K*

DS2761K*

16-TSSOPDS2770 32 11 11 DS2770K

1-Wire is a registered trademark of Dallas Semiconductor.*Future productspecifications are preliminary. Contact factory for availability.

FUTURE

FUTURE

Industrys Only Charger withIntegrated Fuel Gauge Circuitry andSense Resistor

+-

PACK+

PACK-

CHARGE SOURCE

DATA DQ

CC

UV

RSENSE

VINVDD

DS2770

User-Selectable Li+ Pulse Charge orNi Charge with dT/dt Charge Termination

High-Precision Current Measurement with Real-Time Offset Correction Enables 5% Accuracy Fuel Gauging

Measures Voltage in 5mV and Temperature in 0.125C Increments

Optional Integrated 25m Sense Resistor, Individually Trimmed on Each DS2770

40 Bytes of Lockable EEPROM,16 Bytes of SRAM, 64-Bit ROM

1-Wire, Multinode Digital Communication Interface

16-Pin TSSOP, With or Without Optional Sense Resistor

NEW

Battery Chargers

NEW

NEW Imin, timer 16-TSSOPDS2770 1 Li+/Ni Fast DS2770K15VIN ext switch pulse charger integrated with fuel gauge

Voltage and current limit

Voltage and current limit

Voltage and current limitVoltage and current limitVoltage and current limit

SMBus controlled

Voltage and current limitVoltage and current limit

ChargeTermination

MethodVoltage and current limit

SMBus controlled

16-QSOP

28-QSOPMAX1772 2 to 4 Independent Fast, up to 4A Yes 28VIN ext switches, sync rectified step-down controller, input-current-limit loops

MAX1873R/S/T 2/3/4 Li+/Ni Fast, up to 4A

MAX1926 1

Yes 28VIN lowest cost step-down controller, 300kHz PWM, input-current-limit loop

8-SO (1.4W)

28-SSOP

8-MAX

MAX1737 1 to 4 Li+ Fast, up to 4A

MAX1811 1 Li+ Fast, up to500mA

MAX1879 1 Li+ Fast, up to800mA

Yes

Highest efficiency tightest ICHARGE accuracy

Linear charger, internal switch, power through USB port, 0.5% precisionPulse charger, ext switch, no heatdissipation, upgrade to MAX1679

28-SSOP

20-SSOP

28-SSOP

MAX1667 4 Independent Fast, up to 4A

MAX1757 1 to 3 Li+ Fast, up to 1.5A

MAX1758 1 to 4 Li+ Fast, up to 1.5A

Yes

Yes

Yes

SMBus serial interface, level 2 Duracell/Intel-compliant charger14VIN internal switches, sync rectified step-down, input-current-limit loop, timers28VIN internal switches, sync rectified step-down, input-current-limit loop, timers

28-SSOP

Pin-Package

20-SSOP

16-NSO, 20-SSOP

Part No. of SeriesLi+ CellsCell

ChemistryCharge

Rate

MAX745 1 to 4 Li+ Fast

MAX1645A 1 to 4 Independent Fast

MAX1647 Independent Fast, up to 4A

EV Kit

Yes

Yes

Yes

Features

High-efficiency switch-mode controller

SBS level 2 (1.0 compliant) smart battery charger, SMBus interface, current-limiting inputSMBus serial interface, level 2 Duracell/Intel-compliant charger

Li+ Fast, up to 4A Voltage and current limit

Yes 12VIN ext switches, step-down controller, temp sensor, timers

12-QFN(4mm x 4mm)

Small, Low-Cost, Switch-Mode Li+Charger in 4mm x 4mm QFN Package

The MAX1925/MAX1926 are single-cell lithiumion (Li+) switch-mode battery chargers for use indigital still cameras (DSCs) and PDAs. The MAX1925/MAX1926 use an external PMOS pass elementstep-down configuration for high efficiency. Additional features include automatic input-powerdetection, logic-controlled enable, and temperature monitoring with an external thermistor. TheMAX1925 disables charging for inputs greater than 6.1V, while the MAX1926 charges for inputsbetween 4.25V and 12V.

Set Charge Current with One Resistor

Automatic Input Power Sense

Programmable Safety Timer

Autorestart at Cell = 4V

Priced at $1.70

1000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not all packagesare offered in 1k increments, and some may require minimum order quantities.

10,000-up recommended resale. Prices provided are for design guidance and are FOB USA. International prices will differ due to local duties, taxes, and exchange rates. Not allpackages are offered in 1k increments, and some may require minimum order quantities.

FAULT AND CHARGE INDICATOR LED

TEMPERATURE PROTECTION WITH EXTERNAL THERMISTOR

LED

1 CELLLi+

BATTERYUP TO 1A

MAX1926

IN

CHGBATT

CS

GND

THRM

EXT

P-CH

WIDE 4.25V TO 12V WALL-CUBE INPUT VOLTAGE

4mm

x 4m m x 0

.8m

m

12-PIN QFN

0.75% VOLTAGE ACCURACY

SIMPLE APPLICATION CIRCUIT WITH INEXPENSIVE EXTERNAL P-FET

68% SMALLER THAN COMPETITION

NEW

Worlds Smallest, Lowest Noise, andLow-Cost Power Supplies forVaractor Diode Biasing

ON

OFF

MAX5027

FB

LX

GND

INPUT4.5V TO 11V (MAX5025/7)3V TO 11V (MAX5026/8)

OUTPUTADJ TO 36V

(MAX5025/6),FIXED 30V

(MAX5027/8)

ROUT

1FCERAMIC

1FCERAMIC

47H

ON/OFF

VCC

SMALLEST SURFACE-MOUNT COMPONENTS

3 4 9 10 1186 75

MEETS VOUT/IOUT REQUIREMENTSFOR A WIDE RANGE OF APPLICATIONS100

10

1

0.1

INPUT VOLTAGE (V)

I OUT

(mA)

VOUT = 30VVOUT = 32V

VOUT = 12V VOUT = 24V

VOUT = 36V

Fixed 500kHz Power Mode for Easy Filtering

Controlled Slew Rate at LX Pin Reduces Noise

Noise and Output Ripple Less than 1mVP-P

Pricing Starts at $0.45

NO HEAT

CHARGING

3m m x 3 m

m

6-

PINSOT23